Bichromatic lamp.



J. H. FRY.

BIGHROMATIG LAMP.

APPLICATION FILED MAY 2a, 1911.

1,021,458. Patented Mar. 26, 1912.

F E- l 2 SHEETS-SHEET 1.

WWII/[[11111] WITNESSESI INVENTOBS J. H. PRY.

BIGHROMATIG LAMP.

APPLICATION FILED MAY 23, 1911.

2 SHEETS-SHBBT 2.

i FIGA- INVENTOR Patented Mar. 26, 1912. v

JESSE HOWARD FRY, OF ROCHESTER, PENNSYLVANIA,

BICHROMATIC LAMP.

Specication f Letters Patent. Patented Mal'. 26, 1912.

To all whom/t may concern Be it known that I, JESSE HOWARD FRY,

i residing at Rochester, in the county of Beaver and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improvements in Bichromatic Lamps, of which improvements the following is a specification.

My invention has to do with the construction of\lamps, used particularly on transports such as motor-boats,'vehicles and automobiles either to restrict the rays of light of an illuminating source to one or more general directions or to cast rays of light.

of different colors in different directions. And the object of my invention is to provide a neat, durable and eflici'ent lamp constructed entirely of glass.

In the accompanying drawings, which .form part of the specification, two forms of )lamps embodying my invention are shown.

Flgure 1 is an elevation of an angularlyshaped lamp; Fig. 2 a section taken on the line II II, Fig. l, showing the lamp as it appears in the course of its manufacture; Fig. 3 a section taken on the .line II II, Fig. 1, showing the lamp as completed; Fig. 4 .an elevation of `a. spherically-shaped lamp; land Fig. 5 a vertical section taken on the' line V V, Fig. 4.

In the several figures like numerals are used to designate like parts.

In the practice of thev invention -use is made of the well-known process of casing, which consists of uniting, while hot, layers of, glass having different colors or characteristics and removing whatever portions are desired after the article has been formed and when the glass is cool.

,For the sake of definiteness my invention is described as applied to lamps, such asv are used `on automobiles and are called sidelamps and tail-lamps. It is usually desirable in a side-lamp for an automobile t0 have rays of white light cast to the front and to the side away from the machine on which the `lamp is secured, and to have no light cast to the rear and inside. To construct such a lamp entirely of glass, a gather of molten clear lass is made upon a blowpipe, which is t en'inserted into a molten mass of opal or black lglass either of which when cooled vwill be opaque. The compound gather of glass is then inserted into a shaping mold and properly blown to conform .n thereto. While such a lamp may be of any Application flied may as, 1911. serial No. 629,000.

desired form, it may conveniently be of such shape as is shown in Figs. 1, 2 and3. When such a shape is used the two layers of glass, when cooled, will be disposed as is shown in Figf2, the inner layer l being of clearv glass and the outer layer 2 of op-aque glass, and the faces 3 and 4 will preferably be somewhatJ smaller than the faces 5 and 6, so thatwhen the opaque glass is ground or otherwiseremoved from the first named faces, the lamp as a whole will be of av regular and symmetrical shape. An o-pening 7 is formed in the bottom ofthe lamp for the reception of a suitable electric light 10, which light is preferably mounted upon a block 11, extending through the said opening 7 A sleeve 8, forming an extension of the said opening 7 and grooved as at 12 to permit of attachment to a support, is formed glass faces from'which the opaque glass has been removed. Furthermore while a lamp of such angular form as shown may be used for a tail-lamp, it is found to be best-adapted for use as a side-lampand when so used and properly placed upon an automobile the light will be projected only to the front and the side of the machine.

It is usually required, by laws governing the useof automobiles, that, at night, a red lightbe shown at t-he rear and a white light be direct-ed upon the license number of the machine. The lamp shown in Figs. 1, 2 and 3 might be well adapted to such use by covering the clear glass with a layer of red glass, after the mannervalready described, and removing the red glass from one face, which, in the use of the lamp, would be turned in a position to direct Whitel light upon the license number. However, to more definitely fulfil the requirements of a tail/-y lamp, I preferably use a spherically-shaped lamp, such as is shown in Figs. 4 and 5,

and provide a plane faced bulls-eye 13, from which the red glass may be removed. In Fig. 5 the clear glassis indicated at l and the su eradded layer of red glass at 2". The bu lS-eye 13 is preferably a circul'ar plane face and may be inclined to the general aXis of the lamp to the end that the lamp may be placed rearward of and cast a beam of light upon the license nurnber. Itwill be understood of this construet-ion that a layer of red glass originally covering the bulls-eye may be removed from the face of the bulls-eye 13, as indicated by dotted line 9, to permit of the passage of a beam of White light through the bulls-eye, and that a red light Will be seen in all directions except in front of the bulls-eye. The further details of construction of the spherically-shaped lamp consists of an appended atta-Ching sleeve 8, provided with an opening 'Ia through which a suitable electric light may be inserted, similar to the construction heretofore described in connection with Figs. l, 2 and 3.

I do not Wish to limit myself to the colors of glass described herein or to the forms of lamp shown, for, obviously, many changes may bemade by those skilled in the art Without departing from the spirit of my invention.

I claim herein as my invention:

A glass globe for a pilot-light having a plane face formed as a part thereof and having a single opening, the globe body consisting of an inner layer of glass of one color forming the complete globe structure, and an outer layer of glass of a diferent lcolor integrally united with t-liesaid inner layer and covering the said inner Layer eX- cept the plane-face portion thereof.

In testimony whereof I have hereunto set L my hand.

` JESSE HOWARD FRY. Titnesses PAUL N. CRrroHLow,

ALICE A. TRILL. 

